org.apache.jackrabbit.uuid
Class VersionFourGenerator

java.lang.Object
  org.apache.jackrabbit.uuid.VersionFourGenerator

All Implemented Interfaces:

Constants

public final class VersionFourGenerator

extends Object

implements Constants

XXX begin modification by stefan@apache.org

Field Summary

Fields inherited from interface org.apache.jackrabbit.uuid.Constants

CLOCK_SEQ_HI_AND_RESERVED_BYTE_8, FORMAT_POSITION1, FORMAT_POSITION2, FORMAT_POSITION3, FORMAT_POSITION4, hexDigits, TIME_HI_AND_VERSION_BYTE_6, TIME_HI_BYTE_LEN, TIME_HI_START_POS, TIME_HI_TS_POS, TIME_LOW_BYTE_LEN, TIME_LOW_START_POS, TIME_LOW_TS_POS, TIME_MID_BYTE_LEN, TIME_MID_START_POS, TIME_MID_TS_POS, TOKEN_LENGTHS, TOKENS_IN_UUID, URN_PREFIX, UUID_BIT_LENGTH, UUID_BYTE_LENGTH, UUID_FORMATTED_LENGTH, UUID_UNFORMATTED_LENGTH, VARIANT_FUTURE, VARIANT_IETF_DRAFT, VARIANT_MS, VARIANT_NCS_COMPAT, VERSION_FOUR, VERSION_ONE, VERSION_THREE, VERSION_TWO, WRONG_VAR_VER_MSG

Constructor Summary

VersionFourGenerator()
Constructs a new VersionFourGenerator.

Method Summary

Object	nextIdentifier() Returns a new version four UUID.
Object	nextIdentifier(boolean secure) Returns a new version four UUID.
static void	setPRNGProvider(String prngName, String packageName) Allows clients to set the pseudo-random number generator implementation used when generating a version four uuid with the secure option.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VersionFourGenerator

public VersionFourGenerator()

Constructs a new VersionFourGenerator.

Method Detail

nextIdentifier

public Object nextIdentifier()

Returns a new version four UUID.

Returns:

Object a new version 4 UUID.

nextIdentifier

public Object nextIdentifier(boolean secure)

Returns a new version four UUID.

This overloaded method may produce both UUID's using a SecureRandom as well as using normal Random

Parameters:

secure - indicates whether or not to use SecureRandom in generating the random bits.

Returns:

a new version four UUID that was generated by either a Random or SecureRandom.

setPRNGProvider

public static void setPRNGProvider(String prngName,
                                   String packageName)

Allows clients to set the pseudo-random number generator implementation used when generating a version four uuid with the secure option. The secure option uses a SecureRandom. The packageName string may be null to specify no preferred package.

Parameters:

prngName - the pseudo-random number generator implementation name. For example "SHA1PRNG".

packageName - the package name for the PRNG provider. For example "SUN".